Remark Code MA13 on Your EOB — Meaning & What to Do
Remittance Advice Remark Code (RARC)
What remark code MA13 means: You may be responsible for a portion under a specific program rule.
What to do about remark code MA13: Confirm this cost-share with your insurer.
Remark codes add detail to a claim decision. They appear alongside the main adjustment codes on your Explanation of Benefits or remittance notice, giving the specific reason behind remark code MA13.
Seeing remark code MA13 on your EOB?
A denial code tells you what the payer reported, but it may not tell the whole story. Reviewing your EOB and bill together can help clarify what may need attention.
Related codes
RARC MA01You have the right to appeal this Medicare decision.
RARC MA15Your claim was split for processing.
RARC M123The drug name, strength, or quantity information is missing.
RARC MA18This claim was also forwarded to your secondary insurer.
Keep reviewing your bill
- Medical Bill vs EOB: What Is the Difference?
- How to Dispute a Medical Bill — Find Billing Errors Before You Pay
- What Is an Itemized Medical Bill? How to Request One
Frequently asked questions about Remark code MA13
What does remark code MA13 mean on my EOB?
You may be responsible for a portion under a specific program rule.
What should I do about remark code MA13?
Confirm this cost-share with your insurer.
Seeing this code on your own EOB?
Upload the EOB, the bill, or both — MD Bill Check reads the codes on your documents, compares them side by side, and flags what's worth questioning. Free, no account needed.